By-products of the Willgerodt Reaction Applied to α- and γ- Picoline

Abstract

The solution was kept 1 hr. at -50°and warmed gradually over 2 hr. to -10°C. The liquid was washed with 300 ml. of 10% sodium sulfite, twice with water, and dried over anhydrous sodium sulfate. After evaporating chloroform, 151 g. (75%) of colorless 5,6-dichloro-l,3dioxepane boiling at 56°at 1 mm. was obtained.

Ruthenium (II) complexes bearing thioether‐appended α‐iminopyridine ligands: Arene precursors permit access to κ2‐N,N and κ3‐N,N,S complexes

“…While several complexes featuring a thiol donor (i.e. R = H) are known, these compounds are also known to isomerize to form the corresponding benzothiazoline or benzothiazole, or to generate the corresponding disulfide . Introduction of a thioether substituent blocks this tautomerization, enabling the preparation of complexes of pmtpm ( L1 , Scheme 1) featuring manganese(I), iron(II), cobalt(II), nickel(II/III), and ruthenium(II) centers .…”

Ruthenium(II) Complexes Bearing Thioether-Appended α- Iminopyridine Ligands: Arene Precursors Permit Access to K2-N,N and K3-N,N,S Complexes

“…R = H) are known, these compounds are also known to isomerize to form the corresponding benzothiazoline or benzothiazole, or to generate the corresponding disulfide. [51][52][53][54][55] Introduction of a thioether substituent blocks this tautomerization, [56][57][58] enabling the preparation of complexes of pmtpm (1, Scheme 1) featuring manganese, 59 iron, 60 cobalt, 56 nickel, 61,62 and ruthenium. 63,64 Early reports emphasized the structural homology between these complexes and the related metalloenzymes (e.g.…”

Facile synthesis of multinuclear complexes based on a tetra(4-pyridyl)amidinate dirhodium(ii) dimer

“…The ligand N,N9-diphenylisonicotinamidine (L) was synthesized following literature techniques. 8 Two key features of this ligand are important for the formation of the dimer: it possesses a pyridyl group available for metal ion coordination and it has bulky phenyl rings that will encumber the axial site of the dimer and thus possible self-polymerisation by axial pyridine coordination. 9 The tetraamidinate complex (1) was synthesized by a melt reaction (Scheme 1).…”